package managers.messengerManager;

import java.util.SortedMap;

import utils.UserData;

public interface DataManager {

	public void retrieveUsers() throws Exception;

	public SortedMap<Integer, UserData> getUsers();

	public UserData getUser(int userId);
	
	public void updatePersonalMessage (String message);
	
	public void retrievePersonalMessage () throws Exception;

}